They looked around further and found the firearms, police Lt. Gordon Macintosh told KPRC.

The suspect's Chevrolet Silverado was towed after he was arrested. (KPRC)

The discovery harkens back to the grisly Las Vegas shooting nearly three months ago, when gunman Stephen Paddock smuggled more than a dozen weapons into a hotel room overlooking a country music festival and fired on the crowd, killing 58 and injuring hundreds more.

He was booked with trespassing and unlawfully carrying a weapon.

The suspect's Chevrolet Silverado was also reportedly towed and inspected.

The Hyatt has a sprawling New Year's Eve party planned for midnight Sunday, according to its website. The bash is supposed to span four floors and will ring in the New Year by dropping 50,000 balloons.